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Ounces to Grams (oz to g)

Convert ounces to grams instantly. The formula is grams = ounces × 28.3495 — multiply ounces by 28.3495 — 4 oz of chocolate is about 113 g. Everything is computed locally in your browser; nothing is uploaded.

Ounce (oz)Gram (g)

1 oz = 28.35 g · 1 oz = 28.35 g

Quick reference — oz to g

How to convert oz to g

The exact conversion factor between ounces and grams gives the formula grams = ounces × 28.3495. Multiply ounces by 28.3495 — 4 oz of chocolate is about 113 g.

For a rough mental estimate, remember that 1 oz = 28.35 g. To go the other way, see the grams to ounces converter — it uses the reciprocal factor.

Worked examples

Example: convert 4 oz to g. Apply the formula — grams = ounces × 28.3495 — and you get 113.4 g. Reverse-check it by using the grams to ounces to come back to 4 oz; if you do not land on the original number, a factor was inverted.

Example: convert 32 oz to g. Apply the formula — grams = ounces × 28.3495 — and you get 907.2 g. Reverse-check it by using the grams to ounces to come back to 32 oz; if you do not land on the original number, a factor was inverted.

Where the factor comes from

The pound used today is the international avoirdupois pound, defined since 1959 as exactly 0.45359237 kilograms. The kilogram itself was redefined in 2019 in terms of the Planck constant, so the chain of custody now runs from a universal physical constant down to your kitchen scale. Because both ends of the chain are exact, converting is pure arithmetic — the only rounding happens when a result is displayed.

Common mistakes

Confusing mass and force. Pounds-force (lbf) and pounds-mass (lb) are different physical quantities. Recipes and body weight use mass — the factor on this page applies.

Avoirdupois vs troy. Gold, silver and gemstones use the troy ounce (31.103 g), which is about 10% heavier than the avoirdupois ounce (28.35 g) on this page.

Double rounding. kg → lb → oz in sequence compounds rounding error. Convert directly to the final unit in one step.

Quick mental shortcuts

Mental shortcuts: kg → lb ≈ ×2.2 (75 kg ≈ 165 lb); lb → kg ≈ ÷2.2; g → oz ≈ ÷30 (a 100 g chocolate bar is about 3.5 oz). For cooking, weigh once and remember: 1 stick of butter = 113 g = 8 tbsp.

Common oz to g conversions

Ounce (oz)	Gram (g)
1	28.35
4	113.4
8	226.8
12	340.2
16	453.6
32	907.2

FAQ

How do I convert oz to g?

grams = ounces × 28.3495. Multiply ounces by 28.3495 — 4 oz of chocolate is about 113 g.

What is 4 oz in g?

4 oz equals 113.4 g. Use the converter above for any value.

How do I convert g back to oz?

Use the reverse conversion — see our grams to ounces converter. The calculator above also shows the reciprocal rate.

Is the oz-to-g conversion exact?

Yes — modern units are defined by international agreement with exact factors (e.g. 1 inch = 2.54 cm exactly). Results are rounded only for display.

More conversions

cm → in in → cm mm → in in → mm m → ft ft → m km → mi mi → km kg → lb lb → kg g → oz °C → °F °F → °C gal → L L → gal g → cup cup → g g → tbsp tbsp → g g → ml ml → g ml → cup cup → ml fl oz → ml ml → fl oz

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